GeoDLL - Geodetic Development Kit
Function group "User Definitions"

•  Detailed Description of the current Version
•  User Manual with all Function Descriptions
•  User Manual searching for expressions
•  List of Coordinate and Reference Systems
•  Download of the supported NTv2 / HARN grid files
•  Programming example  Group Prices GeoDLL
•  Download  Place order

GeoDLL - Function Groups

•  Function group "Coordinate Transformations"
•  Additional function group "NTv2 Transformations"
•  Function group "NTv2 Tools"
•  Function group "User Definitions"
•  Function group "Parameter Determination"
•  Function group "Distance Calculations"
•  Function group "Notation Calculations"
•  Function group "Map Calculations"
•  Function group "Elevation Calculations"
•  Function group "Transformation Parameter"
•  Function group "Time Zone Calculations"
•  Geodetic functions without group assignment

Continental Drift
At present 2 to 7 cm per year

GeoDLL - User defined Coordinate Transformations

GeoDLL supports the development of geodetic software by providing geodetic functions, which are put together into function groups for specific tasks. To use user defined coordinate transformations in own developments a license for the function group "User Definitions" can be purchased.

The group "User Definitions" contains functions for the input of the parameters of self defined Coordinate Systems, geodetic Reference Systems and earth ellipsoids which can be used with the functions of the group "Coordinate Transformations" besides the predefined GeoDLL systems.

Characteristics of the group "User Definitions"

1. Custom coordinate systems for many projections
1. 16 possible projection types
2. Orthogonal Output Device Projection (Pixel calculation)
2. Custom reference systems
1. Coordinate Frame Rotation (Seven parameters, Helmert)
2. Position Vector Transformation (Seven parameters, Bursa-Wolf)
3. European Standard (Seven parameters, ISO 19111)
4. Molodensky (Three parameters)
3. Custom earth ellipsoids
1. Semi major and minor axes
2. Flattening

Functions of the group "User Definitions"

1. Function setusercoordsys1() - Setup of a user-defined Coordinate System
2. Function setusercoordsys2() - Setup of a 2nd user-defined Coordinate System
3. Function setuserrefsys() - Setup of a user-defined Reference System
4. Function setuserellsource() - Setup of a user-defined source ellipsoid
5. Function setuserelltarget() - Setup of a user-defined target ellipsoid
6. Function getusercoordpar() - Parameter names of a user-defined Coord. System
7. Function getusercoordtyp() - type name of a user-defined Coordinate System

Ausführliche Funktionsbeschreibungen

Detailed descriptions of all geodetic functions of this function group you find here in the online manual!